Apparatus for forming brushes



6 Sheets-Sheet 1 C. JOBST APPARATUS Fon pomme nusmss FEiled Jan. 'f'.l1922 A ma., 1

iMarch ze, 1929.

March 26,l 1929. c, JoBsT APPARATUS FOR FORMING BRUSHES Filed Jan. v.41922' e Smets-sheet 2 March 26, 1929. c. JOBsT APPARATUS FOR FORMINGRUsHEs' Filed Jan. 7, 1922 6 Sheefs-Sheet 3 ammm.

6 Sheets-Sheet 4 C. JOBST Filed'Jan. '7. 1922 Mmh ze, 1929.

C. JOBST APPARATUS FOR FORMING BRUSHES March 26, 1929.

Filed Jan. '7. 6 Sheets-Sheet 5 EGT.

Home is March 26, 1929. Q JOBST APPARATUS Polav EOMING' BRUSHES FiledJan. 7. 1922 6 Sheets-Sheet 6 lttoungs Patented Mar. 26, 1929.

- narran sine-res 1,706,451 PATENT orificev CONRAD JOBST, OIF TOLEDO,OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE T0- LEDO AUTOMATIC :BRUSHMACHINE COMPANY, 0F TOLEDO,` OHIO, A CORPORA- TION OF OHIO.

APPARATUS FOR FORMING'BBUSHES.

Application filed January 7, 1922. Serial` No. 527,592.

The invention relates tothe apparatus for the manufacture of brushes,being more particularly designed for use in the manufacture of smallbrushes, such as tooth brushes.` It is the object of the invention toincrease the rate of production and 'to also obtain a` high gradeproduct and to render the operations to a large degree automatic.

Tn the present state of the art brushes have been manufactured inautomatic machines such as shown in in copending application Serial No.y527,590 'led Jan.' 7, 1922, which simultaneously operate to bore theback of one brush while it is setting tufts in a corresponding boredback. lNith such machines the cycle is determinedy by the number oftufts in the individual brush an-d the machine must be stopped topermitof'transfer of the bored backr and the removal of the finished brushafterV each cycle. Furthermore, a. considerable portion of the ltime isoccupied in the transferring of the backs and removal of the completedbrushes so that the rate of production is not high.

To overcome the objections above referred to have changed the method ofmanufacture by dispensing withv the stopping andr starting of themachine for `each individual brush and by handling the brushes in gangsor groups. This requires the original mount# ing of the brush backs in agang or group holder and the maintaining of the backs in this relation'during all of the subsequent operati such as boring, tuft setting,trimming, etc. The result of the change isfirst, to increase theaccuracy of thev work by securing-more exact registration in each of theseveral operations; second, to very greatly increase the speed ofproduction as the machine is only stopped after the completion of j theentire group, while the time occupied'in transferring of the groupholders isl less than required for the transfer and proper registrationof an individual brush back- Other specii'ic advantages of my improvedmethod and machine will be referred to hereinafter.

ln the drawings:

Figure l is a front elevation of thev work holder for the boring andtuft settingmachine;

Figure 2 is a side elevation thereof;

Figure 3 is avplan view;

Figure l is a plan view of one of the muln tiple or gang brush holders;

Figure 5 is a side elevation thereof; Figure 6 is an end elevation; YFigure 7 is a front elevation of the brush trimming machine;

`Figure 8 is an end elevation thereof. The apparatus as specificallyshown is de signed vfor they manufacture of tooth brushes in-which thebacks andhandles are integral.

It is usual to form the handle with a con t-racted portion adjacent tothe back, formingy a rounded shoulder, while the outer end of the backis merely rounded. This does not give well defined bearing surfaces forengagement with the work holder, so that if a brush, after being onceclamped in theholder, should be transferred to another clamp, exactregistratioiil would be difhcult. However,

with my improved method the brush backs once engaged with-the holder arenot removed therefrom until the brush .is entirely completed and theholders themselves are so fashioned that they may be exactly positionedin the machine withl which they are 'of the holder A and formingshoulders for engagement with the shoulders on the brush backs formed bythe contracted portion of the handle. E are clamping jaws, preferably ofa V-shaped form, and also preferably undercut, said jaws being adaptedto engage the ends of the brush backs and to press the same again-st thepins or lugs l) and against the face of the holder A. Thejaws E slidablyengage lrecesses F in a guide-way Gr secured tothe front of the holderan-d each aw has the reduced shank H, which is surrounded by a spring I.All of these springs abut against a movable block J, which is actuatedby a cam or eccentric K and a handle L to increase or diminish thecompression of the spring. The arrangement is such that when the camretracts the block J, the tension of the springs is only suflicient tohold the brush backs lightly against the pins D, so that the individualbacks may be easily sprung into engagement vvith the holder. l/Vhen,however, the tension is increased by the moveorally slidal ly securedupon horizontal Waysk M on a vertically movable carrier N, Which latteris slidable on the vertical Ways N on a stationary frame`0. These twocarriers are respectively actuated by rotary can s lD and P tlirough themedium of vertical sli les Q, and Q and connecting mechanism. The slidesQ and Q are mounted in a vertical guide- Way R and the slide Q directlyactuates the carrier N to raise the same, thereturn movement beingeffected by gravity. The slide Q is connected by a bell crank lever Sand a link 'l to one end of the slide M. rlhus by properly fashioningthe cams in and P the slides M land N may be moved to carry the if-,forlholders through the desired series of positions.

The boring 'and tuft setting mechanisms which cooperate With the Workholders may ber of any suitable construction but, as diagrammaticallyshoivn in Fig. 3, U is the boring mechanism and V the tuft settingmechanism respectivelyregistering with vthe tivo holders mounted on thecarrier M. These holders are exactly positioned on guides lll on thecarrier so 'that When transferred from one set of guides to the other,they will be in exactly predetermined relation. ln the operation of themachine the brush backs clamped in one holder are successively bored,the inachine continuing its operation Without inter- 4 ruption inpassing from one brush back to the next adjacent one and so onthroughout the series. Simultaneously the tufts are set in thecorresponding positions of the brush backs in the other holder and uponthe completion of the cycle all of the holes in one series of backs pWill have been bored, While all of the backs in the other series willhave tufts set therein. The machine is then stopped, the holder removedfrom the tuft setting position, the holder having the bored backs istransferred and a new holder with unbored baclrs is placed in itsposition. This new holder can be filled vvith brush backs by theoperator during the interval in which the machine is operating upon thepreviously filled holders, so that 'the interval in which the machine isout of action is very short. he holder with the tufted backs is thenplaced in the trimming machine,

Which preferably comprises a rotary trimming shear X and cooperatingstationary shears X. The holder is placed in engagement With guides Y onthe carriage Yand this carriage is then moved upon Ways Z to bring thebrushes successively into operation relative to the shearing mechanism.

ln manufacturing` brushes by the method above described, each individualbrush back is held in an exactly predetermined relation to the severalmechanisms which successively operate thereon so that the Work isexactly performed. Also, production is greatly increased, for theoperating mechanisms are` maintained -in action practically all of thetime.. y

lll/'hat l claim as my invention is:

l. ln a brush making machine the combination cf a reciprocable driller,a reciprocan ble tufter, carriers cooperating respectively with saiddriller and tufter, guideivays on said carriers, a pair ofinterchangeable Work holders having guides engaging the guideways onsaid carriers, means for securing a plurality of brush baclrs on eachofsaid Work holders, mechanism for imparting to each of said carriersstep-by-step movements in transverse directions in the same plane, saidmovements being such that operations are successively performed in acontinuous series on all of the brush backs in each of said Work holdersby.

said driller and tufter respectively.

2. ln a brush making machine, the combination with a reciprocabledriller and a reciprocable tufter, of a common carrier movable in aplane in transverse directions, guideivays on said carrier adjacent thedriller and tufter respectively, interchangeable Work holders engagingeach of said guidevvays, a series of Clamps on each Work holder arrangedto independentlyy secure thereto a series of brush backs in closelyspaced relation, and mechanism for imparting to said carrier astep-by-step movement such that all of the brush backs in each of saidWork holders are operated upon in a continuous series.

3. ln a brush machine, the combination with a simultaneously operatingdrilling and tuft setting mechanisms, of a ivorl carrier movable intransverse directions in a plane in operative relation to saidmechanisms, a plurality ofivorlr holders interchangeably engageable withsaid carrier in like relation to said drilling and tufting mechanismsre-l spectively each holder adapted to secure a series of individualbrush backs therein and means for imparting to said carrier a singlecycle of step by step movements including the steps for all theoperations on all of the backs in said holders.

ln testimony whereof l aflix my signature.

CONRAD JOBST.

